A model holds a pear-shaped perfect D color, Type IIA Flawless clarity diamond weighing 101.73 carats that will be offered for sale for the very first time on May 15, 2013 in Geneva. The raw original stone weighing 236 carats was extracted from Jwaneng mine in Botswana and its cut has lasted 21 months, said Christie's. The diamond expected to reach 30 million US dollars will goes on auction for the first time giving its buyer the privilege of giving it a name.

Glittering 101.73 Carat Diamond

A Christie's member of staff displays a pear-shaped, D colour, flawless diamond of 101.73 carats during an auction preview in Geneva April 30, 2013. The successful buyer will have the privilege to give the gemstone a name as it is the first time this item is offered on sale. It is expected to sell around CHF 28,000,000 (US$ 30,000,000) when it goes into auction May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A Christie's member of staff displays a pear-shaped, D colour, flawless diamond of 101.73 carats during an auction preview in Geneva April 30, 2013. The successful buyer will have the privilege to give the gemstone a name as it is the first time this item is offered on sale. It is expected to sell around CHF 28,000,000 (US$ 30,000,000) when it goes into auction May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A Christie's member of staff displays a pear-shaped, D colour, flawless diamond of 101.73 carats during an auction preview in Geneva April 30, 2013. The successful buyer will have the privilege to give the gemstone a name as it is the first time this item is offered on sale. It is expected to sell around CHF 28,000,000 (US$ 30,000,000) when it goes into auction May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A Christie's employee displays the largest color flawless diamond, weighing 101.73 carats, during a preview at Christie's auction house in Geneva, Switzerland, Tuesday, April 30, 2013. The largest pear-shaped color flawless diamond is expected to reach 28 million Swiss Francs (30 million US$) and it will be the highlight at the Christie's auction on May 15 to Geneva.

Glittering 101.73 Carat Diamond

A Christie's member of staff displays a pair of diamond ear pendants during an auction preview in Geneva April 30, 2013. The pendants set with a cushion-shaped diamond within a brilliant-cut diamond surround, suspending a pear-shaped diamond, weighing approximately 8.16 and 6.90 carats, their last owner was Princess Beatriz (1909-2002), who was married the 5th Prince of Civitella-Cesi, Don Alessandro Torlonia, in Rome. It is expected to sell between CHF 150,000 to 250,000 (US$ 160,000 to 260,000) when it goes into auction May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A model shows three rings (L to R) the ‘Star of Kashmir’, a rarest Kashmir sapphire weighing 19.88 carats, with richly saturated and homogenous cornflower blue colour, estimate SFr.2,400,000-2,900,000 (US$2,500,000-3,000,000), a diamond ring by Graff, set with an oval-shaped, d colour, type IIa 26.24 carats diamond, estimate SFr.2,250,000-3,250,000 (US$2,400,000-3,400,000) and a ring set with a cushion-shaped 23.28 carats Colombian emerald with exceptional size and quality, estimate SFr.1,200,000-1,700,000 (US$1,300,000-1,800,000) during a press preview on April 30, 2013. The rings will be on offer during a sale of magnificent jewels by Christie's auction house on May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A model wears a rare diamond 'belt' bracelet by Van Cleef & Arpels, diamonds monted in platinum, circa 1946, during a press preview on April 30, 2013. The bracelet is expected to reach SFr.160,000-260,000 / Euro 130,000-210,000 during a sale of magnificent jewels by Christie's auction house on May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A pair of diamond ear pendants (each top set with a cushion-shaped diamond within a brilliant-cut diamond surround, suspending a pear-shaped diamond, weighing approximately 8.16 and 6.90 carats) are seen next to a reproduction of a painting showing Beatriz de Borbon y Battenberg. Infanta of Spain, during a press preview on April 30, 2013. The ear pendants expected to reach SFr.150,000-250,000 / US$160,000-260,000 on May 15, 2013 by Christie's auction house in Geneva.

Glittering 101.73 Carat Diamond

A Christie's member of staff displays (L-R) the 'Star of Kashmir' sapphire ring, a diamond ring (26.24 carats) and a natural cushion-shaped emerald ring (23.28 carats) during an auction preview in Geneva April 30, 2013. Items are expected to sell between CHF 2,400,000 to 2,900,000 (US $2,500,000 to 3,000,000), CHF 2,250,000 to 3,250,000 (US$ 2,400,000 to 3,400,000) and CHF 1,200,000 to1,700,000 (US$ 1,300,000 to 1,800,000) respectively when they go into auction May 15, 2013 in Geneva.

Glittering 101.73 Carat Diamond

A model shows three rings (L to R) the ‘Star of Kashmir’, a rarest Kashmir sapphire weighing 19.88 carats, with richly saturated and homogenous cornflower blue colour, estimate SFr.2,400,000-2,900,000 (US$2,500,000-3,000,000), a diamond ring by Graff, set with an oval-shaped, d colour, type IIa 26.24 carats diamond, estimate SFr.2,250,000-3,250,000 (US$2,400,000-3,400,000) and a ring set with a cushion-shaped 23.28 carats Colombian emerald with exceptional size and quality, estimate SFr.1,200,000-1,700,000 (US$1,300,000-1,800,000) during a press preview on April 30, 2013. The rings will be on offer during a sale of magnificent jewels by Christie's auction house on May 15, 2013 in Geneva.